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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 933 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> VIEWOSECOR Client Project ID ARCO 2133, Stockton, CA Sampled Mar 19, 1998 <br /> 3050 Fite Circle, Ste 204 Sample Matrix Water Received Mar 23, 1998 <br /> Sacramento, CA 95827 Analysis Method EPA 5030/8020, DHS Luft Reported Apr 7, 1998 <br /> Attention Rusty Benkosky First Sample# 803-0998 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Sample Sample Sample Sample <br /> Analyte Units Results Results Results Results Results Results <br /> Vg/L 803-0998 803-0999 803-1000 803-1001 803-1002 803-1003 <br /> E-12 PR-1 PR 2 MW-1 MW-2 MW 3 <br /> Purgeable N D N D N D N D 310 N D <br /> Hydrocarbons Reporting Limit 50 50 50 50 50 50 <br /> Benzene ND ND ND ND 36 ND <br /> Reporting Limit 050 050 050 050 050 050 <br /> Toluene ND ND ND ND ND ND <br /> Reporting Limit 050 050 050 050 050 050 <br /> Ethyl Benzene N D N D N D N D 24 N D <br /> Reporting Limit 050 050 050 050 0 50 050 <br /> Total Xylenes N D N D N D N D N D N D <br /> Reporting Limit 050 050 050 050 050 050 <br /> Chromatogram - Weathered <br /> Pattern Gasoline& <br /> Unidentified <br /> Hydrocarbons <br /> C6-c12 <br /> Quality Control Data <br /> Date Analyzed 03/26/98 03/26/98 03/27/98 03/27/98 03/27/98 03/27/98 <br /> Instrument Identification GCHP-7 GCHP-7 GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, % 93 94 100 99 94 101 <br /> (QC Limits = 60-140%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANA#_YTICA ELAP #1624 <br /> irffia C Sehn der <br /> Project Manager/Sacramento Laboratory <br /> 8030992SES <2> <br />